M4.1 earthquake 4 km SSW of Matsudo, Japan
A magnitude 4.1 earthquake struck 4 km SSW of Matsudo, Japan on Sat, Feb 27, 1982, 10:07 PM JST (13:07 UTC), 107 km (66 mi) below the surface.
A larger quake followed: M5.6 8 km WNW of Hitachi-Naka, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb), light
- Local time
- UTC
- 1982-02-27 13:07:37 UTC
- Depth
- 107.0 km (66.5 mi), intermediate-depth
- Epicenter
- 35.740° N, 139.885° E
- Region
- Japan
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.68 km WNW of Hitachi-Naka, Japan · 16271 days ago · 68 km deep · 93 km away
- 4.85 km WSW of Chiba, Japan · 16259 days ago · 74 km deep · 24 km away
- 4.610 km ESE of Okunoya, Japan · 16258 days ago · 94 km deep · 79 km away
- 4.03 km ENE of Honch?, Japan · 16234 days ago · 72 km deep · 12 km away
- 4.08 km NNW of Yokohama, Japan · 16232 days ago · 75 km deep · 36 km away
- 4.42 km WSW of Sakura, Japan · 16230 days ago · 60 km deep · 29 km away
- 4.910 km ESE of Omigawa, Japan · 16229 days ago · 66 km deep · 76 km away
- 4.82 km SSW of Sakai, Japan · 16227 days ago · 65 km deep · 39 km away
- 4.511 km E of Tateyama, Japan · 16219 days ago · 100 km deep · 86 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001jvr. Read Tue, Sep 22, 2026, 12:15 PM UTC.